<template>
  <view>
    <!-- <my-search :bgcolor=" '#efefef' " :radius="5"></my-search> -->
    <my-search @click="gotoSearch"></my-search>
  <view class="scroll-view-container">
    <!-- 左侧滑动的区域 -->
    <scroll-view class="left-scroll-view" scroll-y="true" :style="{height:wh + 'px'}">
      <block v-for="(item, i) in cateList" :key="i">
        <view :class="['left-scrool-view',i===active? 'active': '' ]"
        @click="activeChange(i)">{{item.cat_name}}</view>
      </block>
    </scroll-view>
    
    <!-- 右侧滑动的区域 -->
    <scroll-view class="right-scroll-view" scroll-y="true" :style="{height:wh + 'px'}" :scroll-top="scrollTop">
      <view class="cate-lv2" v-for="(item2, i2) in cateLevel2" :key="i2">
        <!-- 二级分类的标题 -->
        <view class="cate-lv2-title">
          /{{item2.cat_name}}/
        </view>
        <!-- 当前二级分类下的三级分类列表 -->
        <view class="cate-lv3-list">
          <!-- 三级分类的item项 -->
          <view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
            <!-- 三级分类的图片 -->
            <image :src="item3.cat_icon"></image>
            <!-- 三级分类的文本 -->
            <text>{{item3.cat_name}}</text>
          </view>
        </view>
      </view>
    </scroll-view>
  </view>
  </view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar-badge.js'
  export default {
  mixins: [badgeMix],
    data() {
      return {
        wh: 0,
        cateList:[],
        active:0,
        cateLevel2:[],
        scrollTop:0
      };
    },
    onLoad() {
      const sysInfo = uni.getSystemInfoSync() 
      // console.log(sysInfo)
      this.wh = sysInfo.windowHeight - 50
      this.getCateList()
    },
    methods:{
     async getCateList() {
      const {data: res} = await uni.$http.get('/api/public/v1/categories')
      if(res.meta.status !== 200) return uni.$showMsg()
      this.cateList = res.message  
      this.cateLevel2 = res.message[0].children
      },
      activeChange(i) {
        this.active = i
        this.cateLevel2 = this.cateList[i].children
        this.scrollTop = this.scrollTop === 0? 1:0
      },
      gotoGoodsList(item) {
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?cid=' + item.cat_id
        })
      },
      gotoSearch() {
        uni.navigateTo({
          url:'/subpkg/search/search'
        })
      }
    }
  }
</script>

<style lang="scss">
.scroll-view-container {
  display: flex;
  .left-scroll-view {
    width: 120px;
    .left-scrool-view {
      background-color: #f7f7f7;
      font-size: 12px;
      text-align: center;
      line-height: 60px;
      
      &.active {
        position: relative;
        background-color: #FFFFFF;
        &::before {
          content: ' ';
          display: block;
          width: 3px;
          height: 30px;
          background-color: #C00000;
          position: absolute;
          top: 50%;
          transform: translateY(-50%);
        }
      }
    }
  }
}
.cate-lv2-title {
  font-size: 12px;
  font-weight: bold;
  text-align: center;
  padding: 15px 0;
}
.cate-lv3-list {
  display: flex;
  flex-wrap: wrap;
  .cate-lv3-item{
    display: flex;
    flex-direction: column;
    justify-content:  center;
    align-items: center;
    margin-bottom: 10px;
    width: 33.33%;
    image{
      width: 60px;
      height: 60px;
    }
    text{}
  }
}

</style>
